.category_list{
    left: 64px;
    top: 251px;
}
.category_list_cell{
    position: relative;
    
    background-repeat: no-repeat;
    width: 153px;
    height: 32px;
    margin-bottom: 75px;
}
.teacher{
    background-image: url(../img/teacher.png);
}
.campus{
    background-image: url(../img/campus.png);
}
.news{
    background-image: url(../img/news.png);
}
.teacher.focus_on{
    background-image: url(../img/teacher_on.png);
}
.campus.focus_on{
    background-image: url(../img/campus_on.png);
}
.news.focus_on{
    background-image: url(../img/news_on.png);
}
/*
节目列表页面
*/
.media_list{
    left: 329px;
    top: 175px;
    width: 880px;
    display: none;

}
.media_list_cell{
    position: relative;
    float: left;
    width: 116px;
    height: 136px;
    margin-right: 100px;
    margin-bottom: 107px;
    color:#fff;
}
.teacher_name{
    top: 150px;
    font-size: 20px;
    overflow: hidden;
    line-height: 20px;
    height: 20px;
    width: 200px;
}
.teacher_course{
    top: 175px;
    font-size: 16px;
    overflow: hidden;
    line-height: 16px;
    height: 16px;
    width: 200px;
}
/*
校园简介
*/
.introduction{
    left: 285px;
    top: 165px;
    width: 888px;
    text-align: justify;
    display: none;
    color: #fff;
    font-size: 20px;
    text-indent: 2em;
    line-height: 0;
    letter-spacing: 4px;
}
.introduction p{
    line-height: 35px;
    margin: 0
}
/*
新闻列表
*/
.news_area{
    left: 293px;
    top: 143px;
    display: none;
    color:#fff;
    font-size: 20px;
   
}
.news_title{
    position: static;
    margin-bottom: 7px

}
.news_list_cell{
    position: static;
    font-size: 18px;
    line-height: 38px;
    height: 38px;
    width: 830px;
    visibility: hidden;
}
/*
arrow_up
arrow_down
*/
.arrow_up{
    position: absolute;
    left: 736px;
    top: 643px;
    width: 26px;
    height: 23px;
}
.arrow_down{
    position: absolute;
    left: 696px;
    top: 643px;
    width: 26px;
    height: 23px;
}